Cabinet of Ministers Regulations No. 804 in Riga 2005 October 25 (Mon. No 61 25. §) rules on soil and soil quality, regulations Issued under the law "on pollution" in article 12, the second and 2.1 part 1. determines the quality of the soil and subsoil regulations. 2. the soil and subsoil (rock and sediment layers beneath the soil, which can perform an economic activity) quality regulations (annex 1) applies to any soil and soil in the territory of Latvia, regardless of its use. 3. the quality of the soil and subsoil regulations: 3.1 the target value (A value) — specifies the maximum level above which cannot ensure sustainable soil and soil quality;
3.2. the limit values: 3.2.1. precautionary limits (B) — specifies the maximum contamination level above which may have negative effects on human health or the environment, as well as the level to be attained by the bailout, if the bailout does not set more stringent requirements;
3.2.2. a critical threshold (C value) — indicate that, below or above the soil and the bottom of the functional characteristics are seriously disturbed or pollution directly endangers human health or the environment. 4. Soil and soil quality, regulations must not be exceeded when starting new polluting activity. If any of the thresholds are exceeded, it is prohibited to conduct any activities that cause soil and soil quality, and according to the law "on pollution" to the following measures: 4.1 contaminated sites research and monitoring, if precautionary limits has been exceeded (B), or you have exceeded the target value (A value) this provision table 2 of annex 1 the substances referred to in the places where the national environment service regional environmental management assessed as dangerous;
4.2. the rehabilitation of contaminated sites if you have exceeded the critical threshold (C value). 5. soil and soil samples for the determination of the quality of having to describe the studied areas pollution levels: 5.1. soil sampling depth is 25 centimeters. If the accumulation of trūdviel horizon is thinner, the sampling horizon in thickness, but not shallow about 10 inches;
5.2. the average of the soil sample consists of mixing no less than 25 separate look gus evenly remove the studied area, the area of which exceeds five acres;
5.3. If the average of the soil sample found concentrations of the pollutant, which exceeds the limits of prudence, (B), or if you have exceeded the target value (A value) of annex 1 of these regulations 2. substances listed in the table, the contaminant penetration depth, distance and direction determined by taking additional samples of bottom with 50-inch intervals around the contaminated zone for a while to reach the depth and limit which pollutants concentration does not exceed the limit value of prudence, (B) or the target value (A value) of annex 1 of these regulations 2. substances listed in the table;
5.4. in order to determine the level of pollution contaminated soil sites where soil pollution causes the migration of contaminated groundwater (groundwater contaminated area), soil samples are taken with a 50-inch intervals around the prevalence of contaminated groundwater depth (also the underground water level fluctuation area). 6. In order to set the rules referred to in annex 1. the concentration of the soil parameters and on the ground, use the following sample preparation and testing methods: 6.1. heavy metal — cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), zinc (Zn): determination of dry matter concentration in the samples prepared according to standard EN ISO 11466:1995 "soil quality: a Karaļūden soluble elements mineralization" methods and tested according to the standard EN ISO 11047:2003 "soil quality — cadmium , chromium, cobalt, copper, lead, manganese, nickel and zinc content in the soil by extraction with karaļūden. Elektrotermisk-atomabsorbcij flame and spectrometry techniques "methods;
6.2. mercury (Hg) concentrations in the determination of samples prepared and tested according to the standard EN 346:2005 "soil quality – determination of mercury by cold vapour-atomabsorbcij spectrophotometry" methods;
6.3. the concentration of arsenic (As) used for the determination of sample preparation and testing methods, which use less quantifiable is 1.0 mg/kg;
6.4. determination of the concentration of petroleum products used for sample preparation and methods of testing using the amount of petroleum products less quantifiable is 1.0 mg/kg;
6.5. the polyaromatic hydrocarbons (PAHS), polychlorinated biphenyls (PCBs), cyanide, aromatic hydrocarbons, organochlorine compounds, pesticides and cyclohexane used to determine concentrations of sample preparation and testing me tod, which use less detectable concentration does not exceed A value. 7. in determining heavy metal — cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), zinc (Zn), oil, polyaromatic hydrocarbons (PAHS) and polychlorinated biphenyl (PCB) concentrations in the soil and the ground, take into account the grain size distribution of soil and soil composition. 8. grain size distribution of soil and soil composition is determined, taking into account the clay (